When you fart and then touch someone, and say Cheese Touch, the only way to protect yourself from it is to cross your fingers if you are a girl, if you are a boy, put your two fingers together.

The origins come from "cutting cheese".

Tori had a gnarly fart so she walked over to Angelo who had his fingers straight...and Nini, who was crossing her fingers, so Tori couldn't pass on her Cheese Touch. But Mauricio, didn't know about Cheese Touch, so Tori infected him with it. And he died.